Separator for storage-battery plates.



@TATESQ @FFltlE.

WLLQEI .HUERISGN, OF CHICAGO), ILLINUIS, ASSIGNUR TU VESTA ACCUMULATOB,GOT/KEANE, it CORPURATIOBI (IF INDIANA.

SEPARA'EQBJ FQR STQRAGE-BATTERY PLATES.

Mo brewing".

To oil whom it may concern:

Be it lmou-n that 1, WILLIAM lvloumson, a citizen of the United States,residing at Chicago, in the county of Cook and State of lliinois, haveinvented certain new and use ful lrnprorements in Separators forStorage-Battery Plates, of which the following is a specification.

This invention relates to Wood or other porous separators for storagebattery plates and the process of making the same.

The preferred method of making my improved separator consists inimmersing it in a hot, preferably boiling, solution of strontiumhydroxid and allowing it to remain thereinuntil the solution hasimpregnated the pores of the separator.

if then immerse the impregnated separator in asulfa-te solution, such asa sulfuric acid solution, whereby sulfate of strontium ,is precipitatedin the pores of the separator. The plates are then preferably Washed inWater.

rls the result of this'treatment, the pores of the separator are filledto a large degree with the precipitated strontium salt. EX- cessireporosity of separators, especially when made of wood,'is thus correctedand treeing is prevented Without materially affecting the internalresistance of the battery.

We 1 have described strontium sulfate as the salt with which theseparators are impregnated, other salts of strontium sub stantiallyinsoluble in the battery electro- Patented May 29, 1931?.

Application filed April 2, 1917. Serial No. 1559,2536.

lyte and not decomposed upon passage of the, current, may obviously beused, these salts being precipitated from the solution of the strontiumcompound by addition of the appropriate reagent. The separators arepreferably kept moist until used.

I claim 1. A separator for storage battery plates into strontiumsulfate.

5. The method of treating porous separaters, which consists inintroducing intothe pores a solution of strontium hydroXid, and thensubjecting the treated separators to the action of sulfuric acid.

6. ihe method of treating porous separators, Which consists in producingin the pores thereof an insoluble strontium compound.

In testimony whereof I affix my signature in presence of two Witnesses.

WILLIAM MORRISON.

Witnesses:

H. F. BARBOND, J. H. KIMMAL.

Correction in Letters Patent No. l,228,36%o

it is hereby certified that in Letters Patent No. 1,228,369, granted Mes29, 1911, upon tho application of William Morrison, of Chicago,

improvement in Separeto'rs for Storpge-Battery Plates, an error appearsrequirmg correction as follows: In the grant and ii the heading to theprinted specification I the State of incorporation of the assignee waserroneously given as Indiana,

whereas said State should have been given as Illinois, as shown by therecords of assignments in this offiee; and that the said Letters Patentshould be-read with this correction therein that the eamemay conform tothe record of the case in the Patent Ofiice,

Signed and sealed this 17th day of July, A. D, 1917.

{stun} F. W. H. CLAY, Acting ommiuiomr 01PM. C1. 204-29, Y

Illinois, for an

